diplomska naloga
Povzetek
V diplomski nalogi smo analizirali kakovost opazovanj GNSS ob uporabi različnih anten. Preizkusili smo anteno, vgrajeno v ohišje instrumenta Javad Triumph-LS, zunanjo anteno in najmanj dovzetno anteno za odboj signalov od objektov, ki jo imenujemo antena s kovinskim ohišjem. Po raziskavi in preverjanju kakovosti opazovanj GNSS v programih TEQC in Leica SPIDER QC smo potrdili postavljeno hipotezo, da nam antena s kovinskim ohišjem zagotovi najboljša opazovanja. V drugem delu smo preverili, ali se s pokritjem kovinske ovire z belo rjuho oz. leseno ploščo manjša odboj signala od ovire. Ugotovili smo, da se signal v največji meri odbija od kovine. Obenem smo si prizadevali raziskati, kateri so ostali dejavniki, ki vplivajo na velikost večpotja. Predvsem je potrebno paziti na višinske kote in geometrijo satelitov. Opazovanja GNSS smo na terenu izvedli s statično izmero in smo jih nato naknadno obdelali v programskem paketu Leica Geo Office, kjer smo za določitev položaja točk A in B uporabili navezavo na virtualno referenčno točko in stalno delujočo postajo. S tem smo želeli preveriti vpliv oddaljenosti referenčne točke na kakovostno določitev položaja. Ugotovili smo, da so odstopanja v horizontalni smeri milimetrskega velikostnega reda, v vertikalni smeri pa centimetrskega.
Ključne besede
geodezija;diplomska naloga;UNI;GIG;GNSS;Javad Triumph-LS;statična metoda;antene;večpotje;ocena kakovosti;modeliranje;program TEQC;
Podatki
Jezik: |
Slovenski jezik |
Leto izida: |
2016 |
Tipologija: |
2.11 - Diplomsko delo |
Organizacija: |
UL FGG - Fakulteta za gradbeništvo in geodezijo |
Založnik: |
[Ž. Belšak] |
UDK: |
528.28(043.2) |
COBISS: |
7830625
|
Št. ogledov: |
2064 |
Št. prenosov: |
733 |
Ocena: |
0 (0 glasov) |
Metapodatki: |
|
Ostali podatki
Sekundarni jezik: |
Angleški jezik |
Sekundarni naslov: |
Quality assessment of GNSS observations using various antennas |
Sekundarni povzetek: |
In the diploma thesis we analysed the quality of GNSS observations when using various antennas. We tested an internal antenna, installed into a Javad Triumph-LS housing, an external antenna and the choke ring antenna, which is the least sensitive to the reflection of signals from objects. After the survey and quality assessment of GNSS observations in programs TEQC and Leica SPIDER QC we
confirmed the presupposed hypothesis that the choke ring antenna provides us best observations. In second part we checked whether the coverage of the metal barriers with white sheet or wooden panel reduces signal reflection from obstacles. We concluded that the signal mostly reflects by the metal. At the same time, we also tried to explore other factors affecting multipath size. Mostly, it is necessary to
pay attention to the elevation angles and geometry of the satellites. GNSS observations were performed with static method and postprocessed in program package Leica Geo Office, where we determined the positions of points A and B in two modes: virtual reference station (VRS) and permanent station. This way, the influence of distance to reference point on quality position was tested. We concluded that the deviations were of milimeter magnitude in horizontal and of centimeter magnitude in vertical direction. |
Sekundarne ključne besede: |
GNSS;Javad Triumph-LS;static method;antennas;multipath;quality assessment;modeling;program TEQC; |
Vrsta datoteke: |
application/pdf |
Vrsta dela (COBISS): |
Diplomsko delo/naloga |
Komentar na gradivo: |
Univ. v Ljubljani, Fak. za gradbeništvo in geodezijo |
Strani: |
VIII, 35 str. |
ID: |
9234936 |